Carry out the following operations and express the answer wi

Carry out the following operations, and express the answer with the appropriate number of significant figures

A.(0.0049×10000.0)+(2811×13)

B.863×[1259(3.78×107)]

Solution

A.
(0.0049×10000.0)+(2811×13)

When we solve , we get 36592

Now, in the initial problem, we had :
0.0049 ---> 2 sig figs
10000.0 ----> 2 sig figs
2811 ---> 4 sig figs
13 --> 2 sig figs

So, final ans must have only 2 sig figs

36592 has to be written as :

3.7 * 10^4 -----> ANSWER

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B.
863×[1259(3.78×107)]

We get 737468.02

The least no of sig figs is 3

So, write the answer as :

7.37 * 10^5 ---> ANSWER